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Browse Prior Art Database

Token Ring Communications for Power/Logic Monitoring in Large Computer Systems

IP.com Disclosure Number: IPCOM000102323D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 4 page(s) / 133K

Publishing Venue

IBM

Related People

Lee, J: AUTHOR

Abstract

Disclosed is a method of simplifying the communications for the service system for large computer systems through implementation of an "off-the-shelf" communication protocol.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Token Ring Communications for Power/Logic Monitoring in Large Computer Systems

       Disclosed is a method of simplifying the communications
for the service system for large computer systems through
implementation of an "off-the-shelf" communication protocol.

      Large computer systems are composed from functional elements
made up of field replaceable units (FRUs) such as thermal conduction
modules (TCMs), card-on-board (COB) packages, power supplies and
air-moving devices (AMDs). Critical power, thermal, and logic
conditions for each of these elements are monitored and regulated to
set prerequisites to insure proper operation of the system.

      In the IBM 3090 system, the processor controller element (PCE),
logic support stations (LSSs) and power/thermal stations (PTSs)
contain instrumentation and control hardware necessary to maintain
operation of the system at the predetermined logic conditions and
environmental levels.  LSSs reside inside TCM elements, PTSs reside
in several COB packages (PTS boards), and the hardware necessary to
handle PCE to LSS and PTS communication resides in yet another COB
package (service board).

      The 3090 service system is a large data acquisition and
distribution system.  Operating conditions for a large number of FRUs
must be monitored by the PCE.  Critical data from a large sensorset
must be funneled to the PCE through the service and PTS boards.
Conversely, control signals from the PCE must fan out to a large
number of FRUs through the service and PTS boards. Due to the limited
bandwidth of its communication channels, today's service system
employs multiple communication protocols and several hardware package
levels to support the many communication protocols.

      Multiple communication protocols and hardware package levels
represent bottlenecks in the service system.

      The limited bandwidth of current communication channels in the
power/logic service system can be overcome through an "off-the-shelf"
serial communication protocol employed in local area networks.  The
IBM token ring network is one such protocol.

      Through the token ring, many "stations" may share data with
each other in an efficient, straightforward manner. The
implementation of the token ring in the power/logic service system is
shown in Fig. 1.

      The service system is repartitioned in order to remove
redundant communication hardware and make effective use of the token
ring.  The token ring service system is architected in the following
manner:

      PCE Station:
      The PCE operates much like it does today.  However, the PCE
will communicate through...